I only put top level dependancies in requirements-dev.txt, however you are quite right that a naive `pip freeze > requirements-freeze.txt` would result in it fr

I only put top level dependancies in requirements-dev.txt, however you are quite right that a naive `pip freeze > requirements-freeze.txt` would result in it freezing dev dependancies. It's a problem that I hope PIP will solve one day, but I like to keep tooling simple. However because it's so easy to create venvs I regally just rebuild from scratch, do a `pip freeze > requirements-freeze.txt` then install dev dependencies (so not freezing dev dependencies). In many ways I think it's better to not mutate your venv and just rebuild if making significant changes. Fortunately the packaging culture in Python isn't quite the same as with Node and you don't tend to end up with hundreds or thousands of dependancies.